Portable radio apparatus with a folding structure

Abstract: A portable radio apparatus comprising a first housing body (1,22) having at least a key operation pad (4, 24) with a plurality of keys, and a second housing body (2, 21) connected to the first housing body in such a manner that they are freely opened and closed with each other. The key operation pad (4, 24) of the first housing body (1, 22) is covered with the second housing body (2, 21), when necessary. The second housing body (2, 21) is provided with an opening (9, 29) or a push button (12, 32) so that at least one key is operated in a state in which the first and second housing bodies are closed.

Description: FIELD OF THE INVENTION The present invention relates in general to a portable radio apparatus, and in particular to an improvement in a portable radio apparatus in which the key operation pad or-pushbutton dialing pad can be covered with the housing body, when necessary. DESCRIPTION OF THE PRIOR ART It is well known in a portable radio apparatus such as a portable radio transmitter-receiver to adopt a folding structure to enhance its portability. In the portable radio apparatus of the folding structure type, when the cover is opened, the key operation pad is exposed and the apparatus becomes a suitable size for use. When the cover is closed, the key operation pad is covered and the apparatus becomes handy to carry. A conventional portable radio apparatus such like this is shown in FIG. 1 and disclosed in Japanese Laid-open Patent Application, publication No. HEI 4-307841. In the figure, a housing main body 101 is provided with a key operation pad such as a pushbutton dialing pad 102 and a microphone 103. A cover 106 with a speaker 105 is rotatably connected through a hinge 104 to the upper end of the main body 101. The cover 106 is freely rotatable on the hinge 104 in the directions indicated by arrow marks A and B of FIG. 1. When the portable radio apparatus is in its inoperative state, the cover 106 is closed in the direction A and housed in the main body 101, so that the key operation pad 102 is protected and the apparatus becomes handy to carry. When, on the other hand, the portable radio apparatus is in its operative state, the cover 106 is opened in the direction B, the key operation pad 102 is exposed, and then the microphone 103 and the speaker 105 are located into a suitable position for use. However, in the above-described portable radio apparatus, since the key operation pad 102 of the main body 101 will be entirely covered if the cover 106 is closed, there was the problem that the key operation cannot be performed unless the cover 106 is opened. EP 0,414,365 describes a portable telephone comprising a housing having a main body and an extending sleeve-like portion mounted for longitudinal slidable movement between a retracted position when not in use and an extended position for use. The telephone is adapted to conceal selected ones of the keys when it is in the closed position to prevent accidental activation of those keys. It is, accordingly, an important object of the present invention to provide a portable radio apparatus having a structure which can enhance the key operability as the cover is closed. SUMMARY OF THE INVENTION The present invention provides a portable radio apparatus comprising: a first housing body having at least a key operation pad comprising a plurality of keys; and a second housing body connected to said first housing body in such a manner that said first and second housing bodies can be opened and closed with each other, said key operation pad of said first housing body being covered with said second housing body when closed; said second housing body being provided with key operation means for operating at least one key of said plurality of keys of said key operation pad in a state in which said first and second housing bodies are closed; characterised in that said key operation means comprises key pushing means for operating at least said one key of said plurality of keys of said key operation pad in a state in which said first and second housing bodies are closed. According to the portable radio apparatus having the above-described structure, since a necessary key can be operated by the key pushing means in the state of the first and second housing bodies closed, the key operation can be performed without opening the housing bodies when the apparatus is being carried. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects and advantages will become apparent from the following detailed description when read in conjunction with the accompanying drawings wherein: FIG. 1 is a perspective view showing a conventional radio apparatus; FIG. 2 is a plan view showing a portable radio apparatus, the apparatus being in its open state; FIG. 3 is a side elevational view, partly broken away, of the portable radio apparatus of FIG. 2 in its closed state; FIG. 4 is a plan view of the portable radio apparatus of FIG. 2 in the closed state; FIG. 5 is a side elevational view, partly broken away, showing a portable radio apparatus according to a first embodiment of the present invention, the apparatus being in its closed state; FIG. 6 is a plan view showing another portable radio apparatus, the apparatus being in its open state; FIG. 7 is a side elevational view of the portable radio apparatus of FIG. 6 in the open state; FIG. 8 is a side elevational view, partly broken away, of the portable radio apparatus of FIG. 6 in its closed state; FIG. 9 is a plan view showing yet another portable radio apparatus, the apparatus being in its open state; FIG. 10 is a side elevational view, partly broken away, of the portable radio apparatus of FIG. 9 in the open state; FIG. 11 is a plan view of the portable radio apparatus of FIG. 9 in its closed state; FIG. 12 is a side elevational view, partly broken away, showing a portable radio apparatus according to a second embodiment of the present invention, the apparatus being in its open state; FIG. 13 is a plan view showing yet another portable radio apparatus, the apparatus being in its open state; FIG. 14 is a side elevational view of the portable radio apparatus of FIG. 13 in the open state; and FIG. 15 is a side elevational view, partly broken away, of the portable radio apparatus of FIG. 13 in its closed state. DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now in greater detail to the drawings and initially to FIGs. 2 to 4, there is shown a portable radio apparatus. The portable radio apparatus has a folding structure, and a housing body 1 and a housing body 2 are connected through a hinge 3 with each other so that they can freely rotate in a predetermined angle range, as shown in FIG. 3. In this apparatus, the housing body 1 comprises a housing main body and the housing body 2 comprises a cover. In FIG. 2, the housing body 1 is provided at the lower portion of the main surface thereof with a key operation pad such as a pushbutton dialing pad 4 in which a plurality of keys for dialing operation and other operations are arranged. The key operation pad 4 includes a power-supply key 5. On the upper portion of the main surface of the housing body 1 there is provided a speaker 6, and further on the upper end surface of the housing body 1 there is provided an antenna 7 freely extendible and contractible in the directions indicated by an arrow mark Z of FIG. 2. The housing body 2 is provided with a microphone 8 and an opening portion 9 at the lower portion and the upper portion of the main surface thereof, respectively. The microphone 8 is so disposed as to be located at a position suitably away from the speaker 6 in the opened state of the housing body 2, as shown in FIG. 2. The opening portion 9 is provided at a position to which at least the power-supply key 5 of the key operation pad 4 is exposed when the housing body 2 is closed, as shown in FIGs. 3 and 4. The opening portion 9 is located so that necessary keys such as the power-supply key 5 can be operated even in the state in which the housing body 2 is closed. Further, the side walls of the opening portion 9 are formed into a taper shape so that users can operate the necessary keys easily, as shown in FIG. 3. When the portable radio apparatus is used, as shown in FIG. 2, the antenna 7 is extended, the housing body 2 is opened in the direction B, and then the power-supply key 5 is pushed. The power-supply key 5 can also be pushed through the opening portion 9 even in the state in which the housing body 2 is closed, with the result that the opening and closing operation of the housing body 2 becomes dispensable when the power-supply key 5 is turned on and off. It is noted that, if other necessary keys are exposed through the opening portion 9, necessary operations can be performed in the closed state of the housing body 2. When, on the other hand, the portable radio apparatus is not used, the antenna 7 is contracted into the housing body 1 and the housing body 2 is closed in the direction A, so the apparatus becomes handy to carry, as shown in FIG. 3. FIG. 5 illustrates a portable radio apparatus constructed in accordance with a first embodiment of the present invention, the apparatus being in its closed state. Many of the parts of the first embodiment of FIG. 5 are identical to corresponding parts of the apparatus of FIGs. 2 to 4 and the same reference numerals will be applied to the corresponding parts. In this embodiment, a housing body 2 is provided with key pushing means 10 so that a power-supply key 5 and other keys of a housing body 1 can be pushed from the side of the housing body 2 with force, as shown in FIG. 5. The key pushing means 10 comprises a coil spring 11 and a button 12. The button 12 is fitted into the opening portion of the housing body 2 with its flange portion biased outward by means of the coil spring 11. Consequently, the power-supply key 5 can be pushed with the housing body 2 closed, by pushing the button 12 against the biasing force of the coil spring 11. Thus, a provision of the key pushing means 10 makes it possible to push the power-supply key 5 easily from the side of the housing body 2, with the result that the key operability is further enhanced. It is a matter of course that the key pushing means 10 may be provided so as to correspond not only to the power-supply key 5 but to necessary keys. In addition, the construction of the key pushing means 10 is not limited to this embodiment but various kinds of constructions are also possible. For example, the key pushing means 10 of the housing body 2 may also be formed with a member having elasticity. FIGs. 6 to 8 illustrate another portable radio apparatus. The same reference numerals will be applied to members having the same functions as those of the apparatus of FIGs. 2 to 4. Unlike the apparatus of FIGs 2 to 4, the portable radio apparatus of FIGs 6 to 8 has a slide open-closed structure, and a housing body 1 and a housing body 2 are slidably connected through their curved surfaces with each other. In this apparatus the housing body 1 comprises a housing main body and the housing body 2 comprises a cover. In FIGs. 6 and 7, the housing body 1 is provided at the lower portion of the curved surface thereof with a key operation pad such as a pushbutton dialing pad 4 in which a plurality of keys for dialing operation and other operations are arranged. The key operation pad 4 includes a power-supply key 5. On the upper portion of the main surface of the housing body 1 there is provided a speaker 6, and further on the upper end surface of the housing body 1 there is provided an antenna 7 freely extendible and contractible in the directions indicated by an arrow mark Z of FIG. 7. The housing body 2 is provided at the outer flat surface thereof with a microphone 8 and an opening portion 9. The microphone 8 is so disposed as to be located at a position suitably away from the speaker 6 in the state in which the housing body 2 is open, as shown in FIGs. 6 and 7. The opening portion 9 is provided at a position to which at least the power-supply key 5 of the key operation pad 4 is exposed when the housing body 2 is closed, as shown in FIG. 8. The opening portion 9 is located so that necessary keys such as the power-supply key 5 can be operated even in the state in which the housing body 2 is closed. Further, the side walls of the opening portion 9 are formed into a taper shape so that users can operate the necessary keys easily, as shown in FIG. 8. When the portable radio apparatus of FIGs 6 to 8 is used, the antenna 7 is extended, the housing body 2 is slid in the direction B, and then the power-supply key 5 is pushed, as shown in FIGs. 5 and 6. The power-supply key 5 can also be pushed through the opening portion 9 even in the state in which the housing body 2 is closed. If other necessary keys are exposed through the opening portion 9, necessary operations can be performed in the state in which the housing body 2 is closed. When, on the other hand, the portable radio apparatus is not used, the antenna 7 is contracted into the housing body 1 and the housing body 2 is slid in the direction A, so the apparatus becomes handy to carry. It is noted that, if key pushing means 10 such as that shown in FIG. 5 instead of the opening portion 9 is formed in the housing body 2, the key operability can further be improved. FIGs. 9 to 11 illustrate yet another portable radio apparatus. Like the apparatus of FIGs. 2 to 4, this portable radio apparatus has a folding structure, and housing bodies 21 and 22 are connected through a hinge 23 with each other so that they can freely rotate in a predetermined angle range, as shown in FIG. 10. In FIG. 9, the housing body 21 is provided at the upper portion of the main surface thereof with a speaker 26 and at the upper end surface with an antenna 27 freely extendible and contractible in the directions indicated by an arrow mark Z. The housing body 21 is further provided at the lower portion of the main surface with an opening portion 29. The housing body 22 is provided at the lower portion of the main surface thereof with a key operation pad such as a pushbutton dialing pad 24 in which a plurality of keys for dialing operation and other operations are arranged. The key operation pad 24 includes a power-supply key 25. The housing body 22 is further provided at the upper portion of the main surface with a microphone 28. The microphone 28 is so disposed as to be located at a position suitably away from the speaker 26 in the state in which the housing body 22 is open, as shown in FIGs. 9 and 10. The opening portion 29 of the housing body 21 is provided at a position to which at least the power-supply key 25 of the key operation pad 24 is exposed when the housing bodies 21 and 22 are closed, as shown in FIG. 11. The opening portion 29 is located so that necessary keys such as the power-supply key 25 can be operated even in the state in which the housing bodies 21 and 22 are closed. Further, the side walls of the opening portion 29 are formed into a taper shape so that users can operate the necessary keys easily, as shown in FIG. 10. When this portable radio apparatus is used, the antenna 27 is extended, the housing body 22 is opened in the direction B, and then the power-supply key 25 is pushed, as shown in FIG. 10. The power-supply key 25 can also be pushed through the opening portion 29 even in the state in which the housing body 22 is closed, as shown in FIG. 11. It is noted that, if other necessary keys are exposed through the opening portion 29, necessary operations can also be performed in the state in which the housing body 22 is closed. When, on the other hand, the portable radio apparatus is not used, the antenna 27 is contracted into the housing body 21 and the housing body 22 is closed in the direction A, so the apparatus becomes handy to carry, as shown in FIG. 11. FIG. 12 illustrates a portable radio apparatus constructed in accordance with a second embodiment of the present invention, the apparatus being in its open state. Many of the parts of the second embodiment of FIG. 12 are identical to corresponding parts of the apparatus of FIGs. 9 to 11 and the same reference numerals will be applied to the corresponding parts. In this embodiment, a housing body 21 is provided with key pushing means 30 so that a power-supply key 25 and other keys of a housing body 22 can be pushed from the side of the housing body 21 with force, as shown in FIG. 12. The key pushing means 30 comprises a coil spring 31 and a button 32. The button 32 is fitted into the opening portion of the housing body 21 with its flange portion biased outward by means of the coil spring 31. Therefore, if the housing body 22 is closed and then the button 32 is pushed against the biasing force of the coil spring 31, the power-supply key 25 can be pushed with the housing body 22_closed. Further, if the key pushing means 30 such as this is provided at a position corresponding to a necessary key, the necessary key can also be operated from the side of the housing body 21, so the key operability of the portable radio apparatus is further enhanced. In addition, the construction of the key pushing means 30 is not limited to this embodiment but various kinds of constructions are also possible. For example, the key pushing means 30 of the housing body 21 may also be formed with an elastic member. FIGs. 13 to 15 show another portable radio apparatus. This portable radio apparatus has a slide open-closed structure, and a housing body 21 and a housing body 22 are slidably connected through their curved surfaces with each other. Unlike the apparatus of FIG. 2, the housing body 21 comprises a cover, and the housing body 22 comprises a housing main body. In FIGs. 13 and 15, the housing body 21 is provided at the upper portion of the main surface thereof with a speaker 26 and at the lower portion with an opening portion 29. The housing body 22 is provided at the curved surface thereof with a key operation pad such as a pushbutton dialing pad 24 in which a plurality of keys for dialing operation and other operations are arranged. The key operation pad 24 includes a power-supply key 25. The housing body 22 is further provided at the upper end surface with an antenna 27 freely extendible and contractible in the directions indicated by an arrow mark Z. The housing body 22 is further provided at the lower portion of the main surface with a microphone 28. The microphone 28 is so disposed as to be located at a position suitably away from the speaker 26 in the state in which the housing body 21 is open. The opening portion 29 of the housing body 21 is provided at a position to which at least the power-supply key 25 of the key operation pad 24 is exposed when the housing bodies 21 and 22 are closed, as shown in FIG. 15. The opening portion 29 is located so that necessary keys such as the power-supply key 25 can be operated even in the state in which the housing bodies 21 and 22 are closed. Further, the side walls of the opening portion 29 are formed into a taper shape so that users can operate the necessary keys easily, as shown in FIG. 15. When this portable radio apparatus is used, the antenna 27 is extended, the housing body 22 is opened in the direction B, and then the power-supply key 25 is pushed, as shown in FIGs. 13 and 14. The power-supply key 25 can also be pushed through the opening portion 29 even in the state in which the housing body 21 is closed, as shown in FIG. 15. It is noted that, if other necessary keys are exposed through the opening portion 29, necessary operations can also be performed in the state in which the housing body 21 is closed. When, on the other hand, the portable radio apparatus is not used, the antenna 27 is contracted into the housing body 22 and the housing body 21 is closed in the direction A, so the apparatus becomes handy to carry, as shown in FIG. 15. It is noted that, if key pushing means 30 such as that shown in FIG. 12 instead of the opening portion 29 is formed in the housing body 21, the key operability can further be improved. It is also noted that the key operation pad 4 or 24 of the above-described apparatus may be constituted by a liquid crystal touch panel. As has been described hereinbefore, the portable radio apparatus according to the present invention is able to perform the key operation without opening the first and second housing bodies when the apparatus is being carried and therefore enhance the operability of the portable radio apparatus, because necessary keys can be pushed with the key pushing means, in the state in which the first and second housing bodies are closed. While the subject invention has been described with relation to the preferred embodiments, various modifications and adaptations thereof will now be apparent to those skilled in the art. All such modifications and adaptations as fall within the scope of the appended claims are intended to be covered thereby.

Claims: A portable radio apparatus comprising: a first housing body (1,22) having at least a key operation pad (4,24) comprising a plurality of keys; and a second housing body (2,21) connected to said first housing body (1,22) in such a manner that said first and second housing bodies can be opened and closed with each other, said key operation pad of said first housing body being covered with said second housing body when closed; said second housing body being provided with key operation means (10, 30) for operating at least one key (5) of said plurality of keys of said key operation pad in a state in which said first and second housing bodies are closed; characterised in that said key operation means comprises key pushing means (10, 30) for operating at least said one key of said plurality of keys of said key operation pad (4, 24) in a state in which said first and second housing bodies are closed. Portable radio apparatus as set forth in claim 1, wherein said key pushing means (10, 30) comprises at least a movable member (12, 32) energized by energizing means (11, 31) in an opposite direction to a direction in which said plurality of keys are pushed. Portable radio apparatus as set forth in Claim 1 or Claim 2, wherein said first housing body (1) and said second housing body (2) are rotatably connected with each other so that one housing body is rotatable on another housing body in a predetermined angle range. Portable radio apparatus as set forth in any preceding claim, wherein said at least one key of said plurality of keys comprises a power-supply key (5, 25).

Inventors: NAGAI MICHIO, NAGAI, MICHIO, NAGAI, MICHIO, C/O NEC CORPORATION
Applicants: NIPPON ELECTRIC CO, NEC CORPORATION
Application year: 1994
Main classification: H04B1
IPC codes: H04M1, H04B1, H04Q7, H05K5